Airbag control unit with part number 77960-TR0-X810-M1

What does the airbag control unit 77960-TR0-X810-M1 do?

The airbag control unit 77960-TR0-X810-M1 is the central control unit of the restraint system (SRS) for Honda. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered. It reports faults in the system via the airbag warning light.

While driving, the control unit monitors the entire restraint system without interruption. This includes the sensors, the triggering units and the wiring between them, because only a fully functional system can react correctly in an emergency.

If an accident occurs, the unit stores crash data and locks itself. This storage is part of how the system works and plays a role in every later diagnosis.

Why does the control unit 77960-TR0-X810-M1 fail?

The most common cause at the 77960-TR0-X810-M1 is crash data stored after an accident, even if no airbag fired; a normal diagnostic tool cannot erase it. Other possible causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

The other causes concern the electronics themselves and their surroundings. Ageing, moisture and voltage fluctuations act on components and connections, entirely independently of any accident.

From the outside it cannot be said which of these causes applies to the specific unit. Only an inspection of the removed control unit on the test bench shows that.

How can you tell that the 77960-TR0-X810-M1 is defective?

The airbag warning light in the instrument cluster indicates a defect in the 77960-TR0-X810-M1 when it stays on permanently or intermittently. Fault messages in the instrument cluster, no connection to the diagnostic tool and a fault memory that cannot be cleared are also signs. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

The light reports a fault in the restraint system, not its cause. The cause is revealed only by reading the fault memory and, if necessary, by inspecting the unit.

Which vehicles is the 77960-TR0-X810-M1 fitted in?

The assignment on this page is based on our data for Honda. The control unit 77960-TR0-X810-M1 is fitted in these vehicles: Honda Civic 9th generation (2011-2017).

The vehicles for which this number is recorded are listed here.

• Honda Civic 9th generation (2011-2017)

Compare the part number on the label of the removed unit with this page, because that only confirms that it is the right unit. Also have the fault memory read out beforehand, since only this result shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-TS4-U411-M1, 77960-TS4-U811-M2, 77960-TS4-Z611-M1, 77960-TS6-H711-M1, 77960-TT0-T011-M1, 77960-TT0-Y610-M2.

How does the repair of the 77960-TR0-X810-M1 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit 77960-TR0-X810-M1. Next, create a repair order online and send in the well-packed unit. Airbag24 tests it, replaces defective components, erases stored crash data, carries out a function test and returns your own unit.

The order of steps is a safety measure: only once the battery is disconnected can the control unit be removed without risk to the restraint system.

Processing at Airbag24 usually takes 3–4 working days.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 77960-TR0-X810-M1 get to Airbag24?

You send the control unit 77960-TR0-X810-M1 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order in the parcel and pack the unit shockproof.